Kakashi runs out of chakra faster than the speed of light. OT: Sound Four low difficulty. Gaiden Kakashi is around the same level as chunin exams Sasuke who got owned by the sound four.
Sakon was barely phased by Lion's barrageSound4 is overrated. Eventhough he lost, a chunin level Sasuke without Sharingan almost managed to beat them 4 together in taijutsu combat:You must be registered for see images
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And they were even forced to release CS to handle him. Kakashi who was much more powerful even back then will win i think. If CS is restricted, Kakashi will win. It's true that Sharingan drains his chakra, but even back then he was able to handle a 2tomoe Sharingan and use 2Raikiris the same day(even Sasuke couldn't use more than 2), and kill a skilled jounin level ninja with it
Sasuke had chidori, superior stamina, katon variants and the mastery of weapons while Kakashi only had chidori. Also the standards for jounin in Kakashi's era were much lower than in Sasuke's era. In Sasuke's era, it was very difficult to get promoted to even the chunin level since there were no wars so not many ninjas were required to fight. This in turn caused the countries to spend less on their military which further reduced the number of potential chunin/jounin applicants since the standards were raised to counter the surplus of ninjas.Is it a joke? Chunin exams Sasuke was said to be "chunin level", exactly that. He only managed to learn Chidori.
Kakashi at his age was already a jonin, a whole level higher, fought on par against other strong jonins, which proves this wasn't just a honorary title, and once he got a Sharingan, he effortlessly killed one of these jonins. Also, at the age at which Sasuke learned Chidori, Kakashi CREATED Chidori.
Sasuke had chidori, superior stamina, katon variants and the mastery of weapons while Kakashi only had chidori.
Also the standards for jounin in Kakashi's era were much lower than in Sasuke's era. In Sasuke's era, it was very difficult to get promoted to even the chunin level since there were no wars so not many ninjas were required to fight.
Let's take a look into what we mean by chunin and jounin. The likes of Iruka and Mizuki were able to reach chunin level since during those days, there was a huge demand for ninjas because of nine tails attack and Uchiha massacre.
In Kakashi's era, the Leaf was in short supply of ninjas thanks to the shinobi world war so the likes of Kakashi were readily promoted to jounin.
Now do you understand why Kakashi loses so badly here? It took Neji, Chouji, Kankuro, Temari, Shikamaru and Kiba to kill off the sound four. You think kid Kakashi, let alone part 1 Kakashi can actually win against them?